Crane.



PATENTED JUNE 6, 1905.

G. W. SHEM.

CRANE.

APPLIOATION FILED MAR. 17,1905.

2 SHEBTSSHYEET 1 fi rceyyw PAT'ENTED'JUNE 6, 1905 G. W. SEEM.-

CRANE.

APPLICATION nnnn KAY-.17, 1905.

UNITED STATES Patented June 6, 1905.

PATENT OFFICE.

GEORGE W. SHEM, OF ALLIANCE, OHIO.

CHAN E.

To all whom. it 72216; concern:

Be itknown that I, GEORGE V. SHEM, a citizen of the United States, and aresident of Alliance, Ohio, have invented certain Improvements inCranes, of which the following is a specification.

My invention relates to that class of traveling cranes which carry botha main hoistingtrolley and an auxiliary hoisting-trolley.

The object of my invention is to so construct such a crane as to permitready accessibility to the supplementary trolley, to reduce the strainupon the girders which constitute the side members of the crane-bridge,to permit of the mounting at any desired point on the bridge, preferablyat the longitudinal center of the same, of the motor whi h drives thebridge-traversing mechanism, 0 increase the range of movement of both bfthe trolleys, and to permit of a more compact arrangement of thehoisting mechanism on the main trolley than is possible with theordinary construction of crane. These ol jects I attain in the mannerhereinafter set forth, reference being had to the accompanying drawings,in which Figure 1 is a side elevation of a crane constructed inaccordance with my invention, and Fig. 2 is an end view of the same on alarger scale.

Referring in the first instance to Fig. l of the drawings, 1 1 representthe main girders upon which the bridge of the crane is mounted and uponwhich it can travel, said bridge consisting of a pair of longitudinalside girders 2 with suitable transverse connections at the ends, whichconnections constitute end carriages 3, each of the latter havingawheeled truck running upon rails on the main girder 1, and some of thewheels of these trucks being rotated by power derived from a motor 4,which is mounted on the bridge of the crane, so as to effect themovement of the latter back and forth upon the supporting-girders 1.

Mounted upon suitable rails upon the traversing bridge of the crane is atrolley 5, provided with hoisting mechanism of any appropriate characterand'with a motor and gearing for operating said hoisting mechanism. Inthe present instance I have shown my invention as applied to aladle-crane, the hoisting mechanism having two drums 6, whose dependingchains support a bar 7, provided with depending ladle-supporting hooks8.

In cranes of this character a supplementary hoisting-trolley is usuallyemployed for operating a ladle-tipping hook, such supplementary trolleybeing ordinarily mounted upon rails supported upon the inner sides ofthe main bridge-girders 2. This construction is, however, open to manyobjections. In the first place the weight of the supplementary trolleyand the load carried thereby exerts an excessive side strain upon thegirders 2, which must therefore be made heavy enough to resist suchstrain. Furthermore, this method of mounting the supplementary trolleynecessitates the location of the hoisting-chains of the main trolleyoutside of the girders 2, thus requiring a wide separation of thehoistingdrum's 6 and preventing the location of the bridgedriving motor4 upon any part of the bridge except at the extreme end of the same, sothat a shaft almost as long as the cranebridge itself must be employedfor transmit ting power from said motor to one of the bridge-trucks.This also serves to limit the range of movement of the trolleys on thecrane-bridge.

In carrying out my invention I provide the era ne-bridge withsupplementary girders 9,se cured at their ends to the carriages 3 andlocated so far inside of the main girders 2 as to provide ample roombetween the two sets of girders for the operation of the hoistingchainsfrom the main trolley. Upon these supplementary girders 9 is mounted soas to traverse longitudinally a supplementary trolley 10, which isprovided with appropriate hoisting mechanism and with a motor 11 foroperating the same, the chains depending from the hoisting mechanism ofthe supplementary trolley between the girders 9, as shown in Fig. 2, inwhich these chains are illustrated as employed in connection with theladle-tipping hook 12. It should be understood, however, that myinvention is not limited to ladle-cranes, but is embodied in any cranein which a similarly-mounted supplementary hoisting-trolley is employed.

It will be evident that the construction which I have adopted overcomesthe objections to the usual construction which I have hereinbefore notedand enables me to produce a crane in which the parts are compactlydisposed, the strains are divided and distributed, a central location ofthe bridge-driving motor upon the bridge is permitted with itsaccompanying ad vantage of relatively short lengths oftransmitting-shaft between the motor and the bridge-supporting trucks,and in which, furthermore, the range of travel of either trolley is notrestricted by the presence of said motor or other appurtenances of thecrane, a full travel of the trolley from one end of the bridge to theother being permitted.

Having thus described my invention, I claim and desire to secure byLetters Patent 1. A crane havinga bridge with main hoisting-trolleymounted upon the main girders of said bridge, and a supplementarytrolley mounted upon supplementary girders independent of said maingirders, substantially as specified.

2. A crane having a bridge with main hoisting-trolley mounted upon themain girders of said bridge, and a supplementary trolley mounted uponsupplementary girders independent of said main girders, saidsupplementary girders being located between the main girders,substantially as specified.

3. A crane having a bridge with main and supplementaryhoisting-trolleys, the main hoisting-trolley being mounted upon the mainouter girders of the bridge, and the supplementary trolley being mountedupon supplementary interior girders, the hoisting-chains from the maintrolley depending between the said main and supplementary girders,substantially as specified.

i. A crane having a bridge with main and supplementary hoistingtrolleys, the main hoisting-trolley being mounted upon the main out-ergirders of the bridge, and the supplementary trolley being mounted uponsupplementary interior girders, the hoisting-chains from the maintrolley depending between the said main and supplementary girders, andthe hoisting-chains from the supplementary trolley depending between thesupplementary girders which carry said trolley, substantially asspecified.

5. A crane having a traveling bridge with outer main girders,supplementary inner girders, main hoisting-trolley mounted upon the maingirders, and having its hoisting-chains depending between the main andsupplementary girders,a supplementary hoisting-trolley mounted upon saidsupplementary girders,and a bridge-driving motor centrally mounted uponone of the outer girders, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE W. SHEM.

Witnesses:

CHARLES C. NORRIS, J r., WILLIAM E. BRADLEY.

DISCLAIMER- 791,951.Ge0rge TV. Shem, Alliance, Ohio.

CRANE. Patent dated June 6, 1905.

Disclaimer filed March 28, 1910, by the assignee, The Alliancelilac/tine Company.

Enters this disclaimer to claims 1 and 2 of said Patent, which read asfollows:

1. A crane having a bridge with main hoisting-trolley mounted upon themain girders of said bridge, and a supplementary trolley mounted uponsupplementary girders independent of said main girders, substantially asdescribed.

2. A crane having a bridge with main 'hoisting-trolley mounted upon themain girders of said bridge, and a supplementary trolley mounted uponsupplementary girders independent of said main girders, saidsupplementary girders being located between the main girders,substantially as described.[ Qficz'al Gazette, April 5,

limited to ladle-cranes, but is embodied in any crane in which asimilarly-mounted supplementary hoisting-trolley is employed.

It will be evident that the construction which I have adopted overcomesthe objections to the usual construction which I have hereinbefore notedand enables me to produce a crane in which the parts are compactlydisposed, the strains are divided and distributed, a central location ofthe bridge-driving motor upon the bridge is permitted with itsaccompanying ad vantage of relatively short lengths oftransmitting-shaft between the motor and the bridge-supporting trucks,and in which, furthermore, the range of travel of either trolley is notrestricted by the presence of said motor or other appurtenances of thecrane, a full travel of the trolley from one end of the bridge to theother being permitted.

Having thus described my invention, I claim and desire to secure byLetters Patent 1. A crane havinga bridge with main hoisting-trolleymounted upon the main girders of said bridge, and a supplementarytrolley mounted upon supplementary girders independent of said maingirders, substantially as specified.

2. A crane having a bridge with main hoisting-trolley mounted upon themain girders of said bridge, and a supplementary trolley mounted uponsupplementary girders independent of said main girders, saidsupplementary girders being located between the main girders,substantially as specified.

3. A crane having a bridge with main and supplementaryhoisting-trolleys, the main hoisting-trolley being mounted upon the mainouter girders of the bridge, and the supplementary trolley being mountedupon supplementary interior girders, the hoisting-chains from the maintrolley depending between the said main and supplementary girders,substantially as specified.

i. A crane having a bridge with main and supplementary hoistingtrolleys, the main hoisting-trolley being mounted upon the main out-ergirders of the bridge, and the supplementary trolley being mounted uponsupplementary interior girders, the hoisting-chains from the maintrolley depending between the said main and supplementary girders, andthe hoisting-chains from the supplementary trolley depending between thesupplementary girders which carry said trolley, substantially asspecified.

5. A crane having a traveling bridge with outer main girders,supplementary inner girders, main hoisting-trolley mounted upon the maingirders, and having its hoisting-chains depending between the main andsupplementary girders,a supplementary hoisting-trolley mounted upon saidsupplementary girders,and a bridge-driving motor centrally mounted uponone of the outer girders, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE W. SHEM.

Witnesses:

CHARLES C. NORRIS, J r., WILLIAM E. BRADLEY.

DISCLAIMER- 791,951.Ge0rge TV. Shem, Alliance, Ohio.

CRANE. Patent dated June 6, 1905.

Disclaimer filed March 28, 1910, by the assignee, The Alliancelilac/tine Company.

Enters this disclaimer to claims 1 and 2 of said Patent, which read asfollows:

1. A crane having a bridge with main hoisting-trolley mounted upon themain girders of said bridge, and a supplementary trolley mounted uponsupplementary girders independent of said main girders, substantially asdescribed.

2. A crane having a bridge with main 'hoisting-trolley mounted upon themain girders of said bridge, and a supplementary trolley mounted uponsupplementary girders independent of said main girders, saidsupplementary girders being located between the main girders,substantially as described.[ Qficz'al Gazette, April 5,

Disclaimer in DISCLAIMER- 791,951.- George W. Shem, Alliance, Ohio.CRANE. Patent dated June 6, 1905. Disclaimer filed March 28, 1910, bythe assignee, The Alliance Mae/zine Company.

Enters this disclaimer to elaims 1 and 2 of said Patent, which read asfollows:

1. A crane having a bridge with main hoisting-trolley mounted upon themain girders of said bridge, and a supplementary trolley mounted uponsupplementary girders independent of said main girders, subtantially asdescribed.

2. A crane having a bridge with main hoisting-trolley mounted upon themain girders of said bridge, and a supplementa ry trolley mounted uponsupplementary girders independent of said main girders, saidsupplementary girders being located between the main girders,substantially as ,deseribed.[ Oficial Gazette, April 6,

